Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf4a09baf553bc6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-19 08:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf700cace16f456be2300f96760d07cb SHA-1: b5e537d523dcd950e4c0477381776b656ffe0e1c SHA-256: fcf4a09baf553bc640b584e6cc6ad2fb521dfae9282d984381400c27cd36d52f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a game guide. This, combined with the PDF_SEO_LINK_FARM heuristic indicating a large number of external links, suggests a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=dragon%2527+s+dogma+dark+arisen+pawn+guide
    • http://sozedibep.alexiskyriak.com/uploads/1/3/1/0/131070313/xosikowexivozena.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/4272103693.pdf
    • https://cdn.shopify.com/s/files/1/0457/0431/5036/files/zixolanox.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/zotixidegeje.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/23280461932.pdf
    • https://cdn.shopify.com/s/files/1/0438/6865/1680/files/24576420089.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/zosejikevukedik.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/dilapovakarututatape.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/3965793848.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/pafajogenam.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/domivuwurujenededurawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/kegazusuvigutolow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/52773383612.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/elabore_um_texto_expositivo_argumentativo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007047.bin
7807b7d205d60342c5542503ca164b677504982ddd1679845ae29a61301e9dd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 5436 bytes
font_01_sfnt_off000082c6.bin
8fc177154628ed133e739ed9d75d2ad822e9954676d47b95f020f1a405bd2305
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C6 10136 bytes